The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 2010
Filed:
Nov. 14, 2006
Kazuhiko Miyazaki, Kyoto, JP;
Kiyoshi Masaki, Hyogo, JP;
Shinichi Yamada, Osaka, JP;
Masaya Kuwahara, Osaka, JP;
Hideki Shirane, Ehime, JP;
Kazuhiko Miyazaki, Kyoto, JP;
Kiyoshi Masaki, Hyogo, JP;
Shinichi Yamada, Osaka, JP;
Masaya Kuwahara, Osaka, JP;
Hideki Shirane, Ehime, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A second tracking error detector detects the displacement between the track and the light beam and outputs a second displacement detection result based on the comparison of the reproduction signals between first and second pit strings respectively. A second tracking error controller corrects a target position for push-pull control based on the second displacement detection result. A third tracking error controller calculates a correction data of a first displacement detection result based on the correction amount of the target position by the second tracking error controller, and corrects the first displacement detection result based on the calculated correction data.